bunch grass
noun
mass noun
1- N. Amer. a grass that grows in clumps〈北美〉丛生禾草。
1.1
- Schizachyrium and other genera, family Gramineae: several species, especially S. scoparium, used for grazing and in erosion control, especially on the Great Plains.裂稃草属及其他属, 禾本科：数种, 可作牧草和防止水土流失, 尤指生长在大平原上的禾草。